Impact of Storage Conditions and Temperature on the Physicochemical Characteristics and Microbiological Stability of Nigella Sativa Oil

International Journal of Scientific Research in Chemistry, Journal Year: 2024, Volume and Issue: 9(4), P. 11 - 18

Published: Aug. 18, 2024

Nigella sativa is a herb that has been used for centuries to treat various ailments, including infectious diseases. The aim of this work was show in laboratory conditions the influence different temperature regimes and methods storage Sativa oils on their physicochemical properties microbiological stability. Analyzes have established method significant change quality oil, especially when it comes total acidity oil peroxide value, where values increased with time storage. lowest obtained value number at first measurement, Pb = 9.99, which meets prescribed standards safe use, then highest 34.47 sample constantly exposed sun bright bottle. Also, iodine time, 14.56, 102.48. Therefore, extremely important stored suitable packaging dark glass bottles, protected from direct sunlight high temperatures.

Language: Английский

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Synthesis of a New Composite Material Derived from Cherry Stones and Sodium Alginate—Application to the Adsorption of Methylene Blue from Aqueous Solution: Process Parameter Optimization, Kinetic Study, Equilibrium Isotherms, and Reusability

Journal of Composites Science, Journal Year: 2024, Volume and Issue: 8(10), P. 402 - 402

Published: Oct. 3, 2024

Purifying polluted water is becoming a crucial concern to meet quantity and quality demands as well ensure the resource’s sustainability. In this study, new material was prepared from cherry stone powder sodium alginate, its capacity remove methylene blue (MB) determined. The characterization of resulting product, performed via scanning electron microscopy (SEM) Fourier-transform infrared spectroscopy (FTIR), revealed that raw considered for synthesis successfully embedded in polymeric matrix. impact three main working parameters (pH 3–9, adsorbent dose 50–150 g/L, contact time 60–180 min) on retention MB evaluated through response surface methodology with Box–Behnken design. optimal settings, removal efficiency 80.46% maximum sorption 0.3552 mg/g were recorded. followed pseudo-second-order kinetic suitably described by Freundlich, Khan, Redlich–Peterson, Sips isotherm models. experimental results show synthesized composite can be used at least successive cycles adsorption. From these findings, it concluded use cherry-stone-based environmentally friendly, efficacious contaminants environment.

Language: Английский

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Novel biosorbents based on carboxyethyl chitosan for Allura Red dye contaminated water treatment

Chimica Techno Acta, Journal Year: 2024, Volume and Issue: 11(4)

Published: Nov. 22, 2024

Low biodegradability of several dyes leads to their accumulation in water, causing ecological and health damage. The adsorption and, particular, biosorption processes are widely applied for the wastewater treatment. This article presents first comparative study Allura red dye removal under neutral pH at 25 oC applying novel biosorbents: carboxyethyl chitosan hydrogel (CEC) cryogel cross-linked with butanediol-1,4 diglycidyl ether (DEB-CEC). gels were synthesized “green” manner, characterization revealed porous structure high swelling both biopolymer compositions, which properties important adsorption. kinetic studies demonstrated that rate DEB-CEC is better represented by pseudo-second-order, while CEC followed pseudo-first-order kinetics. isotherm Red suited Temkin model samples, maximum capacity 22.523 mg/g (45.4 μmol/g) 10.482 (21.1 DEB-CEC, respectively. results polymers can be used as biodegradable eco-friendly biosorbents from aqueous solutions, making these promising treatment prevention azo-dye environmental pollution.

Language: Английский

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